.mycanvas{
  position: fixed;
  width: 100%;
  height: auto;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
 
  .canvas {
    width: 100%;
    height:calc(100% - 40px);
 
  } 

  .opbt{
    width: 98%;
    height: 30px;
    text-align: end;
   
  }
  
}
